Portable wireless speaker



FIG. 1 is a top, front, right side perspective view of a portable wireless speaker showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, the right side view being a mirror image;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a cross-sectional view thereof along line 7-7 in FIG. 2; and,

FIG. 8 is a cross-sectional view thereof along line 8-8 in FIG. 3.

The broken lines in the drawings illustrate environmental material that forms no part of the claimed design. 

CLAIM The ornamental design for a portable wireless speaker, as shown and described. 